Hydrothermal synthesis and crystal structure of [In2(HPO3)4] •(NH3CH2CH2NH3)

A new three-dimensional indium phosphite, [In-2 (HPO3) (4)] (NH3CH2CH2NH3), was prepared under hydrothermal conditions via using ethylenediamine as a template. Its structure was solved by singlecrystal X-ray diffraction. The compound crystallizes in a monoclinic system, space group P2/n, with cell parameters a =0.91405(5) nm, b =0. 91984(5) nm, c =0.96120(5) nm, beta = 115.9950(10)degrees, V=0.72640(7) nm(3), Z = 2, R-1 = 0.0249, wR(2) = 0.0650, GOF = 1.044. The inorganic topological structure is, built up from the vertex linking of InO6 octahedral and HPO3 pyramidal tetrahedral units, forming eight-membered ring channels along the [506] direction. The diprontonated ethylenediamine molecules are entrapped in eight-membered ring channels.